JP4284482B2 - Hot water system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a hot water supply system, and more particularly, to a hot water supply system with a heating function that has a function of heating and dropping a hot water into a bathtub.
[0002]
There are bathroom heaters and bathroom ventilation dryers (hereinafter collectively referred to as bathroom heaters) that are installed in the bathroom, blow out hot air to dry clothes suspended in the bathroom, and heat the interior of the bathroom. Conventionally used. In such a bathroom heating device, hot water is circulated in a built-in heat exchanger to exchange heat with air, and the air heated by the heat exchanger is blown out toward the bathroom.
[0003]
Among such hot water type bathroom heating devices, there is one that is integrated with or interlocked with a water heater with a bath chasing function. In such a hot water supply system equipped with a bathroom heating function, the bath circulation circuit is branched and the hot water in the bathtub is circulated to the bathroom heating device side. It is also possible to perform bathing operation at the same time.
[0004]
[Problems to be solved by the invention]
However, in such a hot water supply system, the person who takes the first bath on that day usually performs heating operation in order to reduce the discomfort due to the cold when entering the bathroom. Because it is warmed by hot water, the frequency of heating operation is not so high.
[0005]
Therefore, the hot water for heating the bathroom heating device is only cooled by natural heat dissipation after the bathroom heating operation is completed, and the energy is wasted.
[0006]
The present invention has been made in view of the above-described problems of the conventional example. The object of the present invention is to provide hot water in a hot water heating circuit that has conventionally been wasted due to natural heat dissipation in a hot water supply system with a heating function. Is to reduce the amount of combustion heat at the time of bath memorialization by reusing it.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, in the present invention, hot water heating is performed by branching hot water from a water heater having a function of dropping hot water into a bathtub and bath bathing, and a circulation path connecting the bath adapter of the bathtub and the water heater. In a hot water supply system equipped with a hot water branching unit that circulates hot water in the water heater,
When starting the bath chasing operation, the set hot water temperature of the bath is compared with the hot water temperature detected by the temperature sensor provided in the circulation circuit of the hot water heater, and the detected temperature is set to the set hot water temperature of the bath. When the temperature is higher than a certain temperature, the direction control valve provided in the hot water branching unit is switched to discharge the hot water in the circulation circuit of the hot water heater to the bathtub, and the hot water heating is performed by driving the circulation pump. The hot water in the circulation circuit of the vessel is discharged to the bathtub, and then the directional control valve provided in the hot water branching unit is switched to the bath memorial operation, and then the bath memorial combustion is performed.
[0008]
By setting it as the above control methods, since the hot hot water which stays in the circulation circuit of a hot water heater is discharged | emitted in a bathtub, it becomes possible to raise the hot water temperature in a bathtub, and is performed after that It is possible to obtain an energy saving effect that the amount of combustion heating during the bath memorial operation is reduced.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a diagram showing a configuration of a hot water supply system 1 with a heating function according to an embodiment of the present invention. The hot water supply system 1 is mainly composed of a hot water heater 2 and a hot water branching unit 3. The water heater 2 is composed of a main can body 4 having a relatively large combustion number and a sub-can body 5 having a relatively small combustion number, and a heat exchanger 6 and a gas burner 7 are provided in the main can body 4. A heat exchanger 8 and a gas burner 9 are also provided in the sub-can 5. A water intake pipe 10 into which water is injected from a water supply or the like is connected to the water inlet of the heat exchanger 5 provided in the main can body 4, and the heat outlet 6 of the heat exchanger 6 is heated by the heat exchanger 6. A hot water discharge pipe 11 for supplying the hot water to a hot water discharge terminal 13 such as a currant or a shower head is connected, and a flow rate sensor 14 for detecting the amount of water flowing into the heat exchanger 6 is connected to the water intake pipe 10. The heat exchanger 6 is provided with a can body temperature sensor 15 for detecting the can body temperature, and the tapping pipe 11 is provided with a tapping temperature sensor for detecting the temperature of hot water discharged from the heat exchanger 6. 16 and a flow control valve 17 are provided.
[0010]
A circulation path return pipe 20 and a circulation path return pipe 21 connected to the bath adapter 19 of the bathtub 18 are respectively connected to the water inlet and the outlet of the heat exchanger 8 provided in the sub-can 5. The circulation path return pipe 21 is provided with a circulation pump 22, a bath water flow switch 23, and a circulation temperature sensor 24 so that the hot water temperature in the bathtub 18 can be detected by the circulation temperature sensor 24. The hot water dropping pipe 12 branched from the hot water outlet pipe 11 of the water heater 2 is connected to the circulation path return pipe 21 on the downstream side of the circulation pump 22.
[0011]
Further, the gas burners 7 and 9 in the main can body 4 and the sub can body 5 heat the heat exchangers 6 and 8 by burning the combustible gas supplied through the gas supply pipe 36.
[0012]
The hot water branch unit 3 branches a circulation path (20, 21) connecting the bath adapter 19 of the bathtub 18 and the water heater 2, and a heating unit (for example, a bathroom heating device having a heating function) 25 installed in the bathroom. Hot water is supplied to the internal heat exchanger 26. That is, two three-way valves 27 and 28 are provided in the hot water branching unit 3, one of the three-way valves 27 is connected in the middle of the circulation path forward pipe 20, and the other of the three-way valves 28 is a circulation path return pipe. 21 is connected in the middle. A heating forward pipe 29 is branched from a three-way valve 27 connected to the circulation path forward pipe 20, and the tip of the heating forward pipe 29 is connected to a hot water inlet of a heat exchanger 26 provided in the heating unit 25. It is connected. A heating return pipe 30 is branched from the three-way valve 28 connected to the circulation path return pipe 21, and an air separator 31 is provided in the middle of the heating return pipe 30.
[0013]
The air separator 31 has a space for storing hot water, the three-way valve side portion of the heating return pipe 30 is connected to the bottom surface of the air separator 31, and the heating unit side portion of the heating return pipe 30 is the side surface of the air separator 31. It is connected to the. An overflow pipe 32 is branched from the circulation path outward pipe 20 on the bathtub side of the three-way valve 27, and the overflow pipe 32 is connected to the upper surface of the air separator 31 via a water flow switch 33.
[0014]
In the figure, 34 is a room temperature detection sensor of the heating unit 25, 35 is a controller of the hot water branching unit 3, 37 is a controller of the hot water heater 2, and 38 is a heating temperature sensor for detecting the temperature of the hot water in the heating forward pipe 29. It is.
[0015]
Hereinafter, the operation | movement at the time of the driving | operation of the hot water supply system 1 with a heating function which has the above structures is demonstrated according to operation | movement explanatory drawing of FIGS.
[0016]
FIG. 2 is an explanatory diagram showing a bath chasing operation. During the automatic warming operation of the bath, the circulating pump 22 is driven at regular intervals, the hot water in the bathtub is circulated, and the temperature of the circulating water is detected by the circulating temperature sensor 24 to reduce the hot water temperature in the bathtub 18. When it is detected, bath memorial operation starts automatically. In addition, when the bather feels that the bath temperature is low, the bath chasing operation can be started by operating a chasing switch of a bathroom remote controller (not shown).
As shown in FIG. 2, the hot water in the bathtub 18 is circulated by the circulation pump 22 along the path of the bus adapter 19 → the circulation path return pipe 21 → the heat exchanger 8 of the auxiliary can body 5 → the circulation path forward pipe 20 → the bus adapter 19. Circulate. Therefore, the hot water in the bathtub 18 is heated by the sub-can 5 and is chased. At this time, the three-way valves 27 and 28 in the hot water branching unit are respectively switched to the bus adapter 19 side.
[0017]
FIG. 3 is an explanatory diagram showing the heating operation. In the case of heating operation, the three-way valve 27 in the hot water branching unit is switched to the heating forward pipe 29 side, and the three-way valve 28 is switched to the air separator 31 side, so that bathroom heating is operated independently. That is, as shown in FIG. 3, the hot water in the air separator 31 is cooled by the circulation pump 22 into the air separator 31 → the three-way valve 28 → the circulation path return pipe 21 → the heat exchanger 8 of the auxiliary can body 5 → the circulation path outlet pipe 20. It circulates through the path of the three-way valve 27 → the heating forward pipe 29 → the heat exchanger 26 of the heating unit 25 → the heating return pipe 30 → the air separator 31 and the inside of the bathroom is heated.
[0018]
FIG. 4 is an explanatory view showing a linked operation operation of heating and retreat. The three-way valve 27 in the hot water branching unit 3 is switched to the heating unit 25 side, and the three-way valve 28 is switched to the bus adapter 19 side, so that bath bathing operation and bathroom heating operation are started. That is, as shown in FIG. 4, the hot water in the bathtub 18 is circulated by the circulation pump 22 to the bath adapter 19 → the circulation path return pipe 21 → the heat exchanger 8 of the sub-can 5 → the circulation path forward pipe 20 → the three-way valve 27 → It circulates through a route of heating forward pipe 29 → heat exchanger 26 of heating unit 25 → heating return pipe 30 → air separator 31 → overflow pipe 32 → circulation path outgoing pipe 20 → bus adapter 19. Accordingly, the hot water in the bathtub 18 is subjected to additional heating in the sub-can 5, and at the same time, the hot water in the bathtub 18 circulates in the heating unit 25, thereby heating the bathroom.
[0019]
A method for controlling the hot water supply system according to the present invention will be described with reference to the flowchart shown in FIG. When a warming operation start during automatic operation or a bathing switch operation by a bather is commanded (step S1), the heating circuit temperature T is detected by the heating temperature sensor 38 provided in the heating forward pipe 29. (Step S2).
[0020]
When the detected heating circuit temperature T is compared with the bathtub set temperature Ts and the heating circuit temperature T is higher than a predetermined temperature α (for example, 10 ° C.) (YES in step S3), the process proceeds to step S4. At this time, if the heating circuit temperature T is equal to or lower than Ts + α (NO in step S3), the process proceeds to step S8. In step S4, the hot water branching unit 3 switches the three-way valve so as to perform a linked operation of heating and retreat.
[0021]
When the circulation circuit is switched to the linked operation, the circulation pump 22 is driven (step S5), and after the circulation pump is driven for a predetermined time t (for example, 30 seconds), the circulation pump is stopped (steps S6, 7). ). In step S8, the circulation circuit is switched to the bath chasing operation, and then normal bath chasing operation (circulation pump operation, chasing combustion) is started (step S9).
[0022]
The embodiment described above shows a preferred example of the present invention, and the present invention is not limited to this. For example, in the comparison between the heating circuit temperature T and the bathtub set temperature Ts, it is also conceivable that the difference temperature is not set to a constant value but can be varied according to the bathtub set hot water temperature Ts. It is also conceivable that the time t for driving the circulation pump 22 is variable depending on the heating circuit temperature T or the differential temperature T-Ts.
[0023]
【The invention's effect】
The present invention relates to a hot water heater having a function of dropping hot water into a bathtub and a bath remedy, and a hot water branching from a circulation path connecting the bath adapter of the bathtub and the hot water heater and circulating the hot water to the hot water heater. In a hot water supply system equipped with a branching unit, when starting bath chase operation, compare the set hot water temperature of the bath with the hot water temperature detected by the temperature sensor provided in the circulation circuit of the hot water heater. When the detected temperature is higher than the set hot water temperature of the bath by a certain temperature or more, the direction control valve provided in the hot water branching unit is switched to discharge the hot water in the circulation circuit of the hot water heater to the bathtub, The circulation pump is driven to discharge the hot water in the circulation circuit of the hot water heater to the bathtub, and then the directional control valve provided in the hot water branching unit is switched to the bath memorial operation, and then the bath is combusted and combusted. Control method By discharging hot hot water staying in the circulation circuit of the hot water heater into the bathtub and raising the hot water temperature in the bathtub, the amount of combustion heat in the bath retreat operation performed thereafter is reduced. Energy saving effect.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of a hot water supply system with a heating function according to an embodiment of the present invention.
FIG. 2 is a diagram for explaining the operation of the hot water supply system according to the present invention, and is an explanatory diagram showing a bath chasing operation.
FIG. 3 is a diagram for explaining the operation of the hot water supply system of the present invention and is an explanatory diagram showing a bathroom heating operation.
FIG. 4 is a diagram for explaining the operation of the hot water supply system of the present invention, and is an explanatory diagram showing a linked operation operation of a bath retreat operation and a bathroom heating operation.
FIG. 5 is a flowchart showing a control method of the hot water supply system of the present invention.
[Explanation of symbols]
2 Water heater 3 Hot water branch unit 4 Main can body 5 Sub can body 6 and 8 Heat exchanger 18 Bath 20 Circulation path forward pipe (circulation path)
21 Circulation path return pipe (circulation path)
22 Circulating pump 25 Heating unit 27, 28 Three-way valve 29 Heating forward pipe 30 Heating return pipe 38 Heating temperature sensor

Claims (1)

A water heater with the function of dropping hot water into the bathtub and bath remedy, and a hot water branching unit that divides the hot water from the circulation path connecting the bath adapter and hot water heater of the bathtub and circulates the hot water to the hot water heater In the hot water system provided,
When starting the bath chasing operation, the set hot water temperature of the bath is compared with the hot water temperature detected by the temperature sensor provided in the circulation circuit of the hot water heater, and the detected temperature is set to the set hot water temperature of the bath. When the temperature is higher than a certain temperature, the direction control valve provided in the hot water branching unit is switched to discharge the hot water in the circulation circuit of the hot water heater to the bathtub, and the hot water heating is performed by driving the circulation pump. The heating function is characterized in that the hot water in the circulation circuit of the chiller is discharged into the bathtub, and then the directional control valve provided in the hot water branching unit is switched to the bath memorial operation, and then the bath memorial combustion is performed. Hot water supply system with.

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